PSLE Linda saved $320 in April. This amount was a 20% decrease from what she saved in March. The amount she saved in May was a 35% increase from what she saved in April.
- What was the total amount that Linda saved from March to May?
- What was the percentage increase in the amount Linda saved in May compared to March?
|
Savings |
March |
100% |
|
Change |
- 20% |
|
April |
80% |
100 u |
Change |
|
+ 35 u |
May |
|
135 u |
(a)
Savings in March = 100%
Savings in April = 100% - 20% = 80%
80% = 320
1% = 320 ÷ 80 = 4
Savings in March
= 100%
= 100 x 4
= $400
Savings in April = 100 u
Savings in May = 100 u + 35 u = 135 u
100 u = 320
1 u = 320 ÷ 100 = 3.2
Savings in May
= 135 u
= 135 x 3.2
= $432
Total savings from March to May
= 400 + 320 + 432
= $1152
(b)
Increase in savings in May compared to March
= 432 - 400
= $32
Percentage increase
=
Increase in savingsSavings in March x 100%
=
32400 x 100%
= 8%
Answer(s): (a) $1152; (b) 8%